The trailers we've seen of MOS so far have me convinced of the opposite. It looks to me like MOS will be tonally more like BB, i.e. fairly serious and introspective. I hope not as I found BB boring as hell and loved IM, but I do feel that's what we're getting.

I think Nolan has learned from doing TDK, Inception, and TDKR and knows that he needs to make a less "boring" attention getting film that provides a good story and action early on while at the same time fitting in as much backstory as possible. I doubt this will be a BB carbon copy and use the same formula. It will be similar just because it's an origin story, but I doubt it will be like BB and more like IM....